This is our neurotransmitter tote bag which features the molecular structures of many common brain chemicals. We thought that this may be a fun bag for a science, psychology or neuroscience lover. The tote bag is made of heavy canvas and it measures 15 by 13 inches, which is the perfect size for books or a laptop. Some of the chemicals that it features are: acetylcholine, serotonin, dopamine, norepinephrine, anadamide, epinephrine, endorphin, gaba, glutamate and substance P.